8681l Ic Datasheet [updated]
: Main power supply input pins connected to the adapter rail.
If the 8681L is a type of voltage regulator, for instance, you would look for:
A crucial point for troubleshooting is that the OZ8681L requires a proper power supply to function. Reports from the field confirm that for the chip to enable charging, it must first receive its main operating voltage. On many motherboards, this voltage is controlled by a separate transistor and an enable signal (often labeled something like LOT6_CHG ) from the Embedded Controller (EC).
The (often marked as 8681L or OZ8681LN ) is a highly integrated, SMBus programmable, multi-chemistry battery charge controller . Designed predominantly for single-battery portable computer systems, this integrated circuit (IC) serves as a critical Smart Battery Charger (SBC) . It is a foundational component in laptop power management, frequently found on motherboards for modern computing electronics like Lenovo IdeaPad systems.
It can detect a short and disconnect the path in microseconds. 8681l ic datasheet
Ensure the large center ground pad is properly wetted to the PCB board to prevent thermal cutout during high-current charging cycles. If you are working on a motherboard repair, let me know: What are you fixing? What voltages do you measure on the basic power rails? Is the chip showing signs of physical burn marks ?
The pinout for the LB8681CL follows a standard configuration for a motor driver:
The IC incorporates dual high-side current sensors. When the laptop is powered on and running, the chip monitors system power draws in real-time. It dynamically allocates all remaining AC adapter capacity directly to the battery, guaranteeing the shortest possible recharging cycle without overloading the main power rail.
: Frequently used on mainboards for devices such as Lenovo IdeaPad laptops to resolve issues related to "plugged in, not charging." Troubleshooting Common 8681L Failures : Main power supply input pins connected to the adapter rail
: The battery utilizes every available milliampere of overhead current not actively drained by system hardware.
Have you used the 8681L in a design? Did you struggle with oscillations? Let me know in the comments below.
The second major candidate for the "8681L IC" marking is the . This component serves an entirely different function and is from a different manufacturer.
The 8681L IC stands out due to its high efficiency, compact footprint, and robust protective features. Electrical Characteristics 4.5V to 21V DC Output Voltage Range: Adjustable from 0.8V up to 15V Continuous Output Current: Up to 3A Peak Efficiency: Up to 95% Switching Frequency: Fixed 500 kHz (typical) Feedback Voltage: 0.8V ( Advanced Capabilities Integrated MOSFETs: Low On many motherboards, this voltage is controlled by
In the electronics industry, markings like "8681" often refer to the (Lithium Battery Charger) or a similar component where "8681" indicates the manufacturing batch or date, and "L" indicates the lead-free or package type.
The 8681L is a mature, reliable, and predictable LNA for L-band applications. Its "magic" lies in the balance of and 27 dB gain . You won't find a 5V part with that gain-to-current ratio anywhere else.
The IC operates using an , which provides high efficiency (typically >95%) during power conversion. Its primary role is to dynamically manage the power distribution between the system load and the battery.